lol panic, where I live almost all the camera's are placed conveniently behind tree's, road signs and bus stops, most of the time you dont see them untill you are almost driving through them...
if it was an execise in safety they would clearly mark the speed on the back of the camera and all camera's would be in plain view and not hidden, also they would put camera's where it is suitable such as outside old peoples homes , schools and hospitals instead of on the m45 where there are no records of people being run over